body{
    background-image:url(https://i.alipayobjects.com/e/201311/1V4o5xqtgr_src.jpg);
}
.box{
    width: 240px;
    height: 200px;
    padding: 20px;
    border: 1px solid #ccc;
    background-color: #473e3eb8;
    position: absolute;
    top: 20%;
    left: 50%;
    margin:20px;
}
.textBox{
    font-size:20px;
    text-align: center;
    color: #ffffffd4;
    margin-bottom: 20px;
}
.kuangBox{
    width: 100%;
    height: 20px;
    font-size: 15px;
    margin: 10px;
}
.text2{
    text-align:center;

}
#bit{
    width:200px;
    height:40px;
    background-color: rgb(127, 146, 255);
}
.zuo{
    float: left;
}
.you{
    float: right;
}